(TeX-add-style-hook "talk_20mins"
 (lambda ()
    (TeX-add-symbols
     "muhat")
    (TeX-run-style-hooks
     "movie15"
     "color"
     "epsfig"
     "array"
     "epstopdf"
     "subfigure"
     "graphicx"
     "latex2e"
     "beamer10"
     "beamer"
     "compress"
     "brown"
     "professionalfonts")))

